Question

1. Difference between plant cell and animal cell. Draw its well labelled diagram?
2. a) Explain friction as a friend and foe ?
b)Why sliding friction less than static friction?
​

Answer 1

Answer:

1) A plant cell contains a large, singular vacuole that is used for storage and maintaining the shape of the cell. In contrast, animal cells have many, smaller vacuoles. Plant cells have a cell wall, as well as a cell membrane. In plants, the cell wall surrounds the cell membrane.

2) a) Friction is friend (Advantages) :

(i) Friction allows us to grip and catch different objects.

(ii) It helps us to walk comfortably on the surface.

(iii) It helps to minimise the speed or to stop the moving objects.

(iv) It helps us to write on paper or blackboard.

(v) The things do not move from their places due to friction.

Friction is foe (Disadvantages) :

(i) Friction causes wear and tear in objects.

(ii) It causes damage the parts of machines. 

(iii) The machines or tools require regular maintenance due to which a lot of money is wasted.

(iv)It reduces the speed of moving objects so more force is required.

(v)It does not allow the free movement of objects.

b) For a given two surface, sliding friction is slightly lesser than that of the static friction because it is easy to move the object which already in motion than the object which is at rest.

Please Thanks and Please Mark as Brainliest

You have asked 3 Questions in less points so Please Mark as Brainliest

Answer 2

Explanation:

Plant

*A plant cell contains a large, singular vacuole that is used for storage and maintaining the shape of the cell.

*Plant cells have a cell wall, as well as a cell membrane. In plants, the cell wall surrounds the cell membrane

Animal

In contrast, animal cells have many, smaller vacuoles.

look the attachment....

2) Friction is friend:

(i) Friction allows us to grip and catch different objects. (ii) It helps us to walk comfortably on the surface. (iii) It helps to minimize the speed or to stop the moving objects. ...

Friction is foe:

(i) Friction causes wear and tear in objects.

3)For a given two surface, sliding friction is slightly lesser than that of the static friction because it is easy to move the object which already in motion than the object which is at rest.

hope it will help u